#include<stdio.h>

int addToTop(int top)
{
    int sum = 0;
    for(int i = 1; i <= top; ++i)
    {
        sum+=i;
    }
    return sum;
}

int main()
{
    int top = 100;
    int sum = addToTop(top);
    printf("%d\n",sum);
    return 0;
}
